I did read somewhere (don't recall where) that the nutritonal properties of brewed tea do degrade some as time passes, but I don't know how drastically. At any rate, it's not like the tea will ever be bad for you, and it should still taste good. If you find it easier to brew a big batch and keep it in the fridge or a while after, go for it.

tseirPsaduJ wrote:I read somewhere that all of the antioxidants are gone after two days in the fridge. I generally drink mine before that anyway.

2 days in the fridge? Whew! I was informed by my husband that I am the mold mistress because I have the ability to grow red mold in the fridge. I have come into work on monday and found an unrinsed teacup with little white circles in the bottom. Ever since that day I drink it or ice it and drink it immediately. Toss it if it's been sittin'.

... if you have a bag of green that you swear looks like a puerh cake.
... if you think your silver needle should be renamed silver mushroom
... if your tea has more of a life than you do.
... if you wonder if your matcha is some special form of ceremonial black tea.